Multiple spindle drill



llg- 24, H. l. LEwls ET A1.l Re-.v 20, 483

MULTIPLE SPINDLE mum.v

' original Filed Aug. :51, 1935 5 Sheets-Sheet 1 Aug. 24, 1937.

H. l: LEwls Er An. Re. 20,483 MULTIPLESPINDLE DRILL original Filed Aug. 51,1953 5 sheets-sheet V2 HHIIV... LIIIIIU.

. 41' MNEYS Aug. 24,1937. H.` l. Lewls AL. Re. 20,483*

MULTIPLE SPINDLE nn'm. original Fired Aug. s1. 195:5

5 suelas-sheet, 3

f Aug. 24, 1937. l H. l. LEWIS-'Er Ax. Re. 20,483

MULTIPLE sINDLE DRILL 5 sheets-sheet 4 Original Filed Aug. 3l. 1955 Aug. 24, 1937. H. l; LEwls Er AL Re 20,483

MULTIPLE sPINDLE DRILL Original Filed Aug. 31, 1933 5 Sheets-Sheet 5 /A/VEN rae s #ARR Y E w/s esase/cx W se vamo Av1-AISNE Reissued Aug. 2q4, 1937 7PATENT OFFICE MULTIPLE SPINDLE DRILL Harry I. Lewis and Frederick W. Seybold. Westfield, N. J., assignors to Harris Seybold Potter Company, Cleveland, Ohio, a corporation of Delawareoriginal No.' 2.044.709,1mea June 1s, 193s, semi No. 687,586, August 31, 1933.

Application for reissue February 16, 1937. Serial No. 128,082

28 Claims.

This invention relates to improvements in multiple spindle drills, particularly drilling machines for making perforatlons in paper sheets, such for instance as are employed as llers in locsc leaf books.

yOne of the objects of the invention is the provision of means for drilling a series of holes in a stack of paper sheets quickly and accurately. Another object is the provision of means for disposinglof the cuttings of a series of hollow drills in a simple and effective way, which means shall be unaffected by adjustment of the drill heads transversely of theV machine for the purpose of regulating the spacing of the perforations.

Another object isA the provision of control mechanism which in addition to providing automatic stopping at the end of the return stroke. permits automatic stopping at the end of the work stroke, that is at the point of greatest penetration of the drills, in order to facilitate depth adjustment of the individual drills.

Another object is the provision of means for varying the high point position of a rising and falling work table, for the purpose of providing depth adjustment of all drills simultaneously whereby sets of drills of different lengths may be employed.

Another object is the provision of a novel 0 presser foot for gripping the work adjacent the point of application of the drill.

A further object is the provision of means for permitting the gauging of sheets close to the line of centers of the drills. v

3;, Still another object is the provision of eiective means for lubricating the drill.

Other objects and features of novelty will appear as we proceed with the description of that embodiment of the invention which, for the purposes of the present application, we have illustrated in the accompanying drawings, in which Figure 1 yis a front elevational view oi the complete machine, certain Iparts being broken away and others shownu in section in order to L15 more fully illustratethe invention.

Fig. 2 is ay side elevational view. l

Fig. 3 is an elevational view, partly in transverse vertical section and on, a larger scale, of the tableraising and lowering mechanism.

50 Fig. 4 is a side elevational view of the same.

also partly in vertical section.

Fig. 5 is a detail sectional view taken substantially on the line 5 5 ot Fig. Land showing one of the drill heads in elevation on a larger scale.

55 Fig. 6 is a sectional view taken substantially (Cl. 16H6) on the line l o! Fig. 5 showing the drill spindle and accompanying parts.

Fig. 'l is a horizontal sectional detail view o! a portion of a' spindle, the view being taken substantially on the line I-l of Fig. 5.

Fig. 8 is a detail horizontal sectional view taken substantially on the line l--l of Mg. 5.

Fig. 9 is a horizontal sectional detail view taken substantially on the line 9 9 oi' Pig. 4.

Fig. 10 is an elevational detail view oi the sliding jaw clutch member. i

Figs. 1l and 12 are elevational detail views of two levers which may be employed in connection with the invention.

Fig. 13 is a development of the perimeter oi' a slotted drum employed in connection with the control for the table movement.

Fig. l4'is a large scale sectional view through the base or the clamping foot and the drill 1ubricator carried thereby. Fig. l5 is a detail elevational view oi' an eccentric driving element and other integral parts.

In the embodiment oi' the invention herein illustrated the hollow drills rotate without axial movement. 'I'he table upon which tlie work is positioned moves up to feed thework to the drills and then down again to permit the nished work to be removed and new work to be placed in position against the back and side gauges. The cuttings travel upwardly through the hollow drills and through passages in the spindles `and in the drill heads into a transverse conveyor, in the present instance a screw conveyor, which is carried by the frame oi the machine, and with which the head passages are always in communication regardless of the positions of adjustment of the heads. In the present embodiment the table has a ilxed length of stroke up and down,l

.but that stroke may be raised or lowered, -thereby permitting the use of drills oi different lengths. The up and down movement o! the table is arranged to be stopped when-a clutch is disengaged, and a control for the clutch may be set for automatic disengagement at the bottom oi the table stroke, or for automatic disengagement both `at the bottom and at the top of the stroke. The stopping of the table in the top position is for the purpose of enabling the operator to setthe drills accurately in relation to the wooden drill strip in the table. The control also provides for continuous running, that is without disengagement oi the clutch, and for jogging,

that is manual control by means of which the clutch may be thrown in or out at will so as to cause movement of the table up or down' to any extent desired and to stop the movement at the desired position.

Referring now more particularly to the drawings, the frame or body of the machine is indicated by the reference numeral I5.` In the body of the machine arev provided vertical I6,

within which slides I1 'are adapted to move upv and down. 'I'hese slides are integral parts of a pedestal I8 upon which is carried the work table 10 I9. The latter is illustrated in its' lowermostepoprovided with a wide dovetail 23, 24, the intermediate portion between thev two separated parts of this dovetail being curved rearwardly to accommodate the drill heads and their driving 25 shaft, as will presently appear.

vAtthe ends of the dovetail 23, 24 we mount two brackets 26 having dovetail portions which are formed to fit the dovetail 23, 24, these brackets being secured against movement upon 30 the rail by screws 21 or the like. Each bracket carries a bearing for a shaft 28, through which power is furnished for the rotation of the. drill spindles. v

In the lower part of the rail 22 there is a conveyor comprisingy a lengthwise passage 29 which is open on the forward side of the rail throughout the length of the'latter. A conveyor screw 30 may be positioned within this passage. A free exit for cuttings is provided between the hollow post 20 and theadjacent end of passage 29, so that the Icuttings may drop down through the post onto an inclined surface 3l therein,` by means of which the Acuttings are directed rearwardly into any convenient receptacle, not shown.

Any desired number o f` drill heads 32 may be mounted upon the dovetail 23, 24. Each head has a dovetail form tof engage the dovetail portion 23 of the rail, and at the top 'is provided with a wedge'block 33 lwhich engages behind the 50 dovetail portion 24. The wedge'carriesa thread'- ed post 34 which extends through a perforation in the head and 'has threadably mounted thereupon a thumb nut'35. When the head 32 is to be adjusted lengthwise` of the rail 22, the thumb nut 55 35 is loosened, and when the desired adjustment has been made the nut is again tightened, thereby locking the head against movement. The wide do'vetail insures accurate positioning of the various heads, as well `as of the bearings for the shaft 30 28, and thereby maintains the shaft and drill heads in accurate position relative to each other.

Each head 32 is partly hollow'and accommodates a spiral gear 36, which is `free to slide upon the shaft 28 but-is held against turning move- 65 mentwith respect thereto by a key 31 mounted in the gear and free to slide within a keyway 38 in the shaft. Plates 39, removably attached to the head, hold the gear 3by in proper position within the head. l I

" 70 In each head there is a vertices spindle In r0- tatably mounted in ball bearings 4I and 42 and in yan oilless bushing 43, Upon this spindle there is a spiral gear 44` which meshes with gear 33, vand which is slidably keyed tothe spindle in 75 order to vpermit vertical adjustment of the latter.

Such vertical adjustment is accomplished by means disclosed in detail in Patent 1,554,060 to J. T. Wright. Briefly, this means consists of a' nut 45 mounted upon a threaded portion of the spindle between two split collars 45 and 41, the collar 48 engaging an upper ball` thrust bearing 48 and the lower collar 41engaging' a washer 49 which rests upon the lower endof a window 50 in the head. As the nut 45 is rotated in one di- .rection or the other, being held by the collars and by the bearing 48 and washer 49 against verticalmovement "with respect to the head, it causes Ythe spindle-to move up or down in the head. The collars 4B and 41 are caused to rotate with the spindle by means of screws 5I and 52 set into the spindle, the heads of the screws extending into the spaces between the ends of the split collars. The nut 45 is cylindrical on its outer surface, and is provided with one or more vertical slots for the reception of a pin or pins 53 mounted in a knurled ring 54; One or more projections 55 at the lower edge'of ring 54 are adapted to extend into sockets 56 in the upper edge of split collar 61; When an adjustment is4 to be made the operator raises` ring 54 to disengage the projections and sockets 55 and 58, re-

spectively, rotates the ring to impart rotation' to the nut to the desired extent, and then permits the ring to descend again, causing the projections 55 to again enter the sockets 56,?wh`ereby the nut is locked against accidental movement. Quick adiustment of the spindle up or downto accomplish individual adjustment of the drills is thereby provided. f

'Ihe lower end of each spindle has an enlarged part which extends through the bushing 4.3 and comprises a chuck for the reception of the hollow drill 51. 'This enlarged portion of the spindle is provided with a passage 58 communicating at the bottom with the bore of the hollow drill and deflected at the top and terminating there at a somewhat reduced portion of the spindle in a mouth 59 `which opens into an annular chamber 60 in the head surrounding the spindle. Opposite the mouth 59 the spindle is provided with la wing 6I which sweeps through v.the chamber 80 and serves to expel any cuttings discharged from the mouth 59 into an inclined passage 62 formed in the head in communication with the chamber 6K1. The lower end of the 'passage 62 kregisters with the conveyor passage 29 in the rail 22. vThe hollow drill perse'forms no part of the present invention but, as an example of a drill which may be employed for the purpose, reference may be had to Dom Patent 1,279,495, issuedy September 24, 1918.

i A work clamping foot 63 is carried by each head, and preferably comprises a bifurcated end which y straddles the drill 5`I.` lThis head is attached to threaded socket in the' upper extremity of the cylindrical part 64. A nut 66 threaded onto' the threaded portion ofthe hexagonal rod may be turned down against a cylindrical portion l644 to lock the` two plunger elements in desired relative adjustment. The plunger extends through a cylindrical bore in the head 32'ofk a sizle to slidably t vthecylindrical part 64 .of the p linger.` yAround the hexagonal rod within thisV bor e`.the`re isfa spiral spring 6 1 which bears'at itslo Werf end against the nut 65 and at' its upper endag'a'ihst a plug 68 monted'in theupper extremity of the bore Fand providedl withr a"hexagonal opening "-which"act's asa guideior` thehexagonal part 65 ofthe plunger as it moves up and down. The

plug 58m'ay'be held against movement by a set screw E9. Theplug B8 prevents the plunger from with the plate 8| for a setting ofthe perforations close to the edges `of the paper stock. In 'such 4eases we mount upon the gauge plate'BI a plurality of gauge strips 83 which have upper portions yhooked over the plate 8| and which are secured lin desired vposition by set screws 84.' These turning during the operation'of the machine, but

' if any slight rotational adjustment of the plunger y-is desired lit may be secured by looseningythe screw 89, after which the plunger may be turned to the desired angle and the screw again tightened 10"-is a collar mounted uponthe plunger above thehead and held inv any desired position byv` a set screwfll. This `collar 10 acts as an adl5`j`ustable stop to limit the plungerf y When the stop 10 is adjusted downwardly on the plunger the initial position of the presser foot 681s raised, and atfthe same time the initial pressure of the spring 61 is increased, but with a given` relative `relationbetween'the parts 6I the downward movement of and '65 of the plunger, and assuming that the spring 6I isy alwaysunder more or less pressure,

then' the spring pressure exerted byl the' r f0ot 63 upon the work 'pilevaries directly with ""the, distance between the presser foot 89l and the h eadv32, in other words it varies directly with 'fthefdegree of penetration of the drill into the ,paper stock. The' stock therefore is gripped most warmly at the ena of the work stroke when the need lfor gripping is greatest, but in practice the "adjustments :are such that the paper is .also gripped under a considerable pressure at the beginning of the work stroke;

gauge strips are mounted out of alignment y with the drill spindles, and they permit the formation of perforations right up to the gauge line. The Vtable is also provided with a side gauge 85, omit- `ted from Fig. l for the sake of clearness; 'I'his gauge may be mounted or adjusted in any desired manner.

' In the forward end of the table I9 there is a.r

depending hanger 88 carrying` a split bearing 81 within which is oscillatably mounted a shaft.88.

.`A` crank handle 89 is pinned to the forward end of this shaft. On the split bearing there is` a screw clamp with a clamp handle 90. The shaft 8 8 extends through the pedestal I8 in which it has a bearing, On its rear end it carries an eccentric 9| which formsa pivotalbearing for the out changing the length of vthe stroke.

We provide special means for applying lubrica- .tion to the 'exteriorsurface ofthe drill in order to facilitate its travel through the paper stock. but the lubricating liquid is of such a character and it is applied so sparingly as not tocause any discoloration of the paper around the perforation. To this end we provide a fountain brush which comprises a hollow metal container 12 with a brush tuft 13 at its lower extremity. This vcontainer is threadablymounted inthe foot Il 45 and has a knurled head 14 by which it may be turned soy as to position itself axially at such a point asl to cause the brush to 'engage the side of the drill to suchvan extent as to feed the proper amount of lubricant onto the rotating surface of the drill. In the upper end oi' the container there is a filler p lug 15 which is provided with a. tapered central opening. A ,tapered plug 16 fits this opening. When the plug 16 is loosened or removed atmospheric pressure is free to assist gravity in producing a flow oi lubricant through the brush y13 onto thedrill. When the plug 16 is pushed tightly into its socket, however, air cannot enter the container and the ow of lubricant f is interrupted.

o0 In the top ofthetable lsgbneath the line of centers ofthe drills 51 there is* a transverse 'I'he mechanism for reciprocating the table and the control for that mechanism constitute a unit vwhich is separable fromv the balance of the machine for facility in repair and-replacement.`

This unit is mountedin a box 95 'which may be to the forward transverse part of the frame-by bolts 96. A cover 91 closes the rear of the box. In the top of the box there vis an opening 98 through which the connecting rod 92 extends.

On. the forward wall .of the box 95 there is formed a forwardly and rearwardly extending boss 99 within which is supported a large pin or xed shaft |00. Upon this pin there is rotatably mounteda casting illustrated in Fig. 15, which includes an eccentric |0|, a concentric disc |02 with tapped holes-|08 therein, 'and a drum |04.

A pair of eccentric .straps |05 and v|08 embraces the eccentric |0I. Studs |01 secure these eccen- 'tricstraps together and to the of bolts or studs |09 extended through openings inthe worm wheel into the tapped holes |03 of groove 11 which'receivs a. maple or other wooden and2l. n' 'I'he backv gauge may [be adjusted for- Y Toward. and backward to any vdesired'p'osition, and may be locked-in such position by means of a hand nut 82 on the upper end of la clamping Astud mounted' inthe dovetail block 80. f

- *When drills ofshort length are employed the 75 larger lower ends of the spindles may interfere the disc. A plate ||0 secured to the rear end' y-oi a" clutch member i I1 carried upon the end of a 'Shaftfl I8 aligned with the shaft' H2, This shaft Cil Iltis lmounted inlball bearings carried in an outwardly extending cylindrical boss II'9 on the box. Beyond the boss H9 there is keyed to '20 of conveyor screw 30.

shaft a iiy-wheel |20 whichoverhangs the boss ||9 to some extent and is provided with a pair of integral V-pulleys |2|. V-belts |22 run from vthese pulleys over a pair of small pulleys 5 |23 on the shaft of an electric motorjl24, the .base |25 of which is hung from a transverserod |26 about which the base may pivot. Adjusting screws |21 are threaded through the lower end of the base |25 and bear against some fixed lpart of the machine frame or-box 95. By this means the proper tension in the belts may be secured and maintained. f

On the outer extremity of the shaft ||6 we -mount a sprocket wheel |20 which is connected by means of a chain |29 with a sprocket |30 on` oneextremity of shaft 26. Driving force from the latter shaft to the conveyor screw 30 is transmitted by a pinion |3| made integral with sprocket |30 and meshing with a gear |32 on the shaft A brake shoe |33 is adapted to engage the periphery of ily-wheel |-and is plvotally mounted upon the short end of a bell crank lever |34 which is pivoted at |35 in the frame of the machine. At its upper end it carries an operating handle |36 which projects through an opening in the machine frame. This braking means may Ibe employed to stop the fly-wheel promptly after the motor switch has been opened.

The sliding clutch member ||5 may be caused to move away from engagement with the clutch member ||1 when a pin |31 on the upper end of a bell crank lever |36 is caused to drop into engagement with a cam groove formed in an enlargement of the clutch member. When this occurs` the rotation of the clutch member with its cam face against pin |31 forces the clutch member'to the right against the action of spring ||6,

disconnecting the clutch members and thereby 4 interrupting the application of' driving force to the table moving mechanism. Lever |36 is provided with a perforated hub |39' which is mounted upon a short shaft |40 that has bearing in a side wall of box 95. The lever |36 is secured 4" against rotation uponthe shaft by means of a set screw, not shown, threaded into the tapped hole |4|. On the outer end of shaft |40 there is secured a bell crank lever |42. Pivotally con- ,.P nected at |43 to this lever is a rod |44 which runs through a perforated bracket |45 mounted on the box 95. Below this bracket a coil spring |46 surrounds the rod. This spring abuts'against and is adjustably tensioned by a pair nuts |41 5 threaded onto the lower end of the rod. The spring tends to rock the shaft |40 in a clockwise direction v.as viewed in Figs. 2 and 4. In order to rock the shaft |40 in an anti-clockwise direction we attach to thelower end of lever |42 at |46 n a 4link |40 which extends through a suitable opening in the box 95 and is pivotaliy connected at its forward extremity to a. crank |50. The latter is pinned to a shaft |5|, and on this shaft there is also secured a pedal |52. When pressure 65 is applied to the latter by the operator's foot, the shaft |40 is turned anti-clockwise against the action of spring |46f Lever |30 has plvotally mounted thereon at |53 another bell crank lever |54, the lower arm 70 of which bears against a spring pressed4 plunger |55 slidable in -a socket |56 formed in a projecting arm |51 of the lever |36. 'Ihe upper arm of lever |54 is formed to enter` a notch |56 in the periphery of the clutch member ||5.` A pin `|59 75 mounted in a socket |60 in lever |36 is adapted clutch members a second time.

lclutching engagement, and the application of power to the table moving mechanism is thereby Iinterrupted, the mechanism tends to stop, but there might be suillcient fly-wheel effect to rotate clutch member ||5 far enough to permit pin |31 to descend again into engagement with the low part of the cam surface on the clutch thereby temporarily engaging the The lever |54 falling into socket |56 on the clutch member prevents such an occurrence. It also enables a stopping of the table at an absolutely accurate position, for instance at the very top of its stroke, which is of advantage in setting the drillsfor depth of cut. A

In yaddition to the pedal means for manually withdrawing the clutch pin 31, I provideautomatic means which will now be described. |6| is an oscillatable shaft which may be moved longitudinally.. It has'four different longitudinal positions, determined by a spring detent |62 adaptmember,

ed to take into any one of four different annular' grooves Ain the shaft. The shaft extends out through an opening |63 in the -forward wall. of the machine frame and on its outer extremity carriesA a knob |64 to the rear face of which is secured a sector shapedplate |65. This plate serves as a pointer which is used in conjunction with a plate |66 (Fig. 9) on the top of a bracket |61 to indicate to the operator the longitudinal setting of the shaft I6 I.

A crankarm |66 is pinned to shaft |6|. 0n it is pivoted at |59 a blade- |10 which has a notch in its lower edge to receive a stop pin |1| carried by the arm |68. A tension spring |12 tends to hold the forward en d of the plate down. This loose mounting of the plate |10 upon the arm |68 prevents jamming and possible breakage of the parts.

On a splined rear portion of shaft |6| there is slidably mounted against relative rotation an arm |13, which at its outer extremity is plvotally connected with a link |14 that extends down to and is plvotally connected with lever |36 at the point |15` thereof. It will be evident therefore that if the arm |66 is swung clockwise in Fig. 3 the link |14 will be raised and the shaft |40 will be turned anti-clockwise, thereby withdrawing the clutch Vthe drum, when-the blade enters that slot enabling spring |46 to turn. shaft |40 clockwise and disengage the clutch. The slot |16 is so Apositioned as to stop the table at the bottom of its stroke. In the third position of the shaft,

marked Stop top onplate |66, the blade |10 can enterAshallow'slot |11 as weil as deep slot |16. 'I'hese slots being arranged -180" apart, the table stops at the bottom of its stroke and again,

after the driving mechanism is released manu ally, at the top of its'stroke, and so on. In the rearmost position' of shaft |6|, marked Jog on plate'l66. the blade |10 is withdrawn from any contact with drum |04. The spring`|46 is accordingly free to throw the pin |31 to clutch dis- "26,488 engaging position, and it is heid there'eneepi; dur- 1o through openings |80 in the rail and'threaded" into tapped openings in the frame have been removed. When this is done the chain |29 isA iirst disconnected. The rear sides of the posts 2l and 27| are open suiliciently to permit the protruding parts of the shaft 28 and screw conveyor '30, .with their sprockets and gears, to be withdrawn.

` the drawings two drill heads are illustrated. It is to be understood, however, that any number within the capacity of the machine may be employed. When the back and side gauges have been set for a given piece of work and the drill heads have been positioned, drills are in the spindles. The operator then swings handle 5| to loosen split bearing 98. after which he lmoves handle l! so as to lower the table with respect to the connecting rod 92. Next, he f sets the knob I with the plate |65 opposite the notation Stop top. He then the motor |24 and the table travels upwardly ,to the top of itsstroke, and stops owing to the fact that the bladeV |10 drops int-o slot |11 in drum l". VThe operator now manipulates handles Sl and 8! again to raise the table sutliciently to cause one or more of the drills to engage the wooden strip 18. Owing to the fact that the drills may' not all beoi' identically the same length they may not all touch the strip 18, but the operator next proceeds to make them do so by manipulating the,

rings SI-of the individual spindles in the manner o heretofore described, it being understood, of

course, that the motor is stopped while such adiustment is being made.

Next the operator sets lmob |84 with the plate |65 opposite the notation Stop bottom. With the motor running, the operatorwill then touch the pedal |52 with his foot, thereby withdrawing blade |1l from slot |11 and permitting the clutch members to engage, whereupon the table will' 60, In some cases it may b possible toremove -nished work and put new work in its place n without a stop at the bottom of the stroke, and in that event the shaft IGI will be set'with the plate |65 opposite the notation "Continuous.

65 The jog" position of shaft IBI is not a running position, but is used frequently to move the mechanism throughy part of a stroke while the machine is being inspected or serviced.

Having thus described our invention, we claimz 70 l. In va machine of the class described, a frame, a rail mounted thereon, a drill head mounted upon and adjustable lengthwise of rail, a spindle rotatably mounted in said head, a driving shaft extending through said head parallel to 15 said rail, gearing between said shaft and spindle movable lengthwise of the shaft deine head is moved along the rail, and bearings for the ends of said shaft mounted 'upon said rail.

2. In a; machine ofthe class described, a rail having a dovetail supporting'portion, a drill head mounteduponand adjustable lengthwise .of said dovetail supporting portion,` a spindle rotatably mounted in said head, a driving' shaft parallelvto saidrail extending through said head, gearing between said shaftand' spindle movable lengthwise of the shaft as the head is moved along the supporting rail, and brackets carryingbearings for said shaft, said brackets bei-.Dg mounted upon said dovetail portions at the ends of the rail.

3. In a machine of the class described, a rail, a drill head mounted upon and adjustable lengthwise of said rail, a hollow drill rotatably carried by said head, adriving shaft extending through Asaid head parallel to said rail, gearing between sage therein open on the side-toward said adjustable head, a mechanical conveyor in said passage, a hollow drill rotatably mounted in said head, means for driving said drill, and means for, .delivering cuttings from said drill into saidk conveyor passage. n

5. In a machine of the class described, a rail, a drill head mounted upon and adjustable lengthwise of said rail, said rail having a lengthwise passage therein open on the side toward said adjustable-head, a spindle rotatably mounted in said head, a hollow drill mounted, in said spindle, means for rotating said spindle, said head having' an annular chamber surrounding the spindle and said spindle having a passage therethrough for Areceiving cuttings from said drill and delivering them into said annular chamber, and said head having an inclined passage connected with said chamber and registering with the open side of said rail passage.

6V. Ina machine of the class described, a rail, a drill head mounted upon and adjustable length-` wise oi said rail, said rail having a lengthwise passage therein open on the side toward said adjustable head, a spindle rotatably mounted in said head, a I hollow drill mounted in said spindle, means'for rotating said drill, said head having an annular chamber surrounding the spindle and said spindle having a passage therethrough for receiving cuttings from said drill and delivering them into said annular chamber, said head having an inclined ypassage connected with said chamber and registering rwiththe open side of said rail passage, and a sweeper blade on said spindle within saidannular chamber for forcing cuttings into said inclined passage, f

7. In a machine of the class described, a rail, a drill head mounted upon and adjustable lengthwise of said rail, a conveyor 'carried by said rail extending lengthwise thereof, and means for de.- livering cuttings from said drill head to saidv conveyor effective in all'positions of the drill head.

.8. In a machine ofthe clam described,- a rising and falling table. mechanism for, causing said table to move up and down through a given stroke of predetermined length, said mechanism 'comprising a connecting rod, a pivot for one end of 6 sogas vsaid connecting rod, and an eccentric mountingl for .said pivot by means of which its distance from said table may be varied.

9. In 'a machine of the class described, a rotat- 6 ing drill, means for feeding the drill and the work toward each other, and means xed with respect to the work during the drilling, operation for brushing liquid onto the side of the drill.

movement thereof to a suflicient extent to expose said tension varying .means 17. In a machine of the class described, a head having a vertical bore therethrough, a plunger extending through said bore,'said plunger being 5 formed -in two separable parts with the joint therebetween normally positioned within said 10.` In a machine of the class described, a rotating drill, a' presser foot adapted to engage the work adjacent the drill, 'means for feeding the drill and the work towardeach other, and means carried by the presser foot for applying liquid o to the side of said drill.

11. In a machine of the class described,.a drill,

a work table beneath the drill, mechanism for producing relative movement of the drill and table toward and away from each other ina recurring cycle, said mechanism comprising a crank and connecting rod, and control means settable to interrupt the said movement yat the point of greatest separation; or to interrupt the movement both at the point of greatest separation and at the point of closest approach.

12. In a machine of the class described,a drill, a work table beneath the drill, mechanism for producing relative movement of the drill and table toward-and away from each other, said mechanism comprising a crank and connecting rod, and control means settable to permit continuous operation .of said mechanism, to interrupt' the said movement at the point of greatest separation, to interrupt. the movement both at the point of greatest separation and at the point of closest approach, or to interrupt the movement at any desired point.

13. In a machine of the class described, a pair of spaced posts,za-rail mounted between said posts,

a drill head adjustably mounted upon said rail, a spindle in said head, a shaft removably' mounted in the rail extending through said drill head and operatively connected with said spindle, one end of said shaft having a driving element thereon, and means for removably securing said rail to said posts.

14. In a machine of the class described, a pair of spaced posts, a rail mounted between said the lower end of the plunger, spring means with- .in the head tending to depress said plunger, and an adjustable stop on the upper end of the plunger adapted to engage said head to -limit the downward movement of the plunger.

16. In a machine of the class described, a head having a vertical bore therethrough. a

o plunger extending through said b ore, a presser foot on the lower end ofthe plunger, spring means within the head tending to depress said plunger, means carried by the plunger for varying the .tension of the spring means, and an adjustable stop on the upper end of the plunger adapted to engage said head to limit the downward movement of the plunger and to permit downward bore, a presser foot on the lower e'ndv of the plunger, spring means within the headtendinl to depress said plunger, andan adiustable stop on the upper end of the plunger adapted to engage said head-to limit the downward movement of the plunger and to permit downward movement lthereof to an extent sufdcient to' expose said joint, whereby the plunger may be and removed from the bore.

l18. In a machine of the class described, a head having a vertical bore therethrough, a plunger extending through said bore, the upper portion of said plunger having a non-circular cross section, a collar having an opening therethrough shaped to slidably fit the non-circular portion of the plunger, said collar having a circular outer surface fitting within said bore and rotatable therein, and means for holding the collar in any one of a plurality of different angular positions, whereby the angular arrangement of the plunger may be adjusted.y

19. In a machine of the class described, a rotating drill, a presser foot adapted to engage the disassembled work adjacent the drill, means for feeding the drill and the work toward' each other, and a fountain brush carried by the presser foot in position to engage the side of the drill and to brush liquid thereonto.

20. In'a machine of the class described, a drill,

a work table beneath the drill, a crank and coni necting rod for producing a cycle of relative movements of the drill and table from a point of greatest separation to a point of closest approach and back again to said point of greatest separation, and control means settable in advance for automatically interrupting said cycle Yat the point of closest approach. f

21. In a machine of the class described, a drill,

means for adjusting the drill longitudinally, a.

work table beneath the drill, a crank and connecting rod for producing a cycle of relative movements of the drill and table from a point of greatest separation through a stroke of xed length vto a point of closest approach, and back again to said point of greatest separation, and

kcontrol means settable in advance for automatmeans settable in advance for interrupting the said reciprocation at that end ofl the stroke in which the said elements approach each other.

23. In a machine of the class described, a drill,-

a work table beneath the drill, means for vertically reciprocating one of said elements through a stroke of given length, said means being normally interrupted automatically at the point of greatest separation of said elements only, and

means actuatable during the operation of the machine for automatically interrupting the said reciprocation when said'movable element next arrives at the point of closest approach.

V24. A paper drilling unit, comprising a paper drill hollow throughout its length to permit passage of cuttings therethrough, a rotatable chuck adapted to operatively engage the drill, an airtight housing embracing said chuck and provided v with an outlet, said chuck having an opening through its body, one end of the opening being in ope-n communication with one of the hollow ends of. the drill and the opposite end being in open communication with the interior of said housing, a horizontally disposed fan blade semounted in said chuck, means for rotating said spindle, a xed casing surrounding said chuck and having a discharge opening for cuttings, said chuck having a passage therethrough connecting the bore of the drill withthe interior of said casing, and said chuck carrying a sweeper blade rotatable within the casing and eiective for forcing through said discharge opening cuttings deliv- .ered from the drill into the casing.

26. In a machine of the class described, a. spindle, a xed casing through which said spindle projects, said spindle carrying a chuck Within the casing, the chuck having a cylindrical portion closely tting the internal wall of the casing, a hollow drill mounted in, the chuck and extending downwardly through the casing, means for rotating the spindle, said chuck having a passage therethrough connecting the bore of the drill with the interior ofthe casing above sald cylindrical portion, said chuck having a laterally extending wing within the casing above said cylindrical portion, said casing having an opening through which cuttings may be forced by the action of said rotating wing.

27. In a machine of the class described, a paper,

drill hollow throughout its length to permit passage of cuttings therethrough, a rotatable chuck operatively engaging the drill, a housing surrounding said chuck, said housing being closed at its upper end except for an opening accommodating the spindle, the housing and chuck being formed to `provide a substantially annular chamber around the chuck, said housing having an outlet opening communicating with said annular chamber, the chuck and casing having a close lit at the. bottom of said chamber to close the latter, said chuck having a passage through its body, one end of the passage being in open communication with the upper end of the hollow drill and the opposite end of the passage being in open communication with said annular chamber, and a horizontally disposed blade or wing carriedby said chuck and extending into said annular chamber adapted to agitate said cuttings and' discharge the same through said outlet opening.

28. In a machine of the class described, a hol- 4 low drill, a rotatable chuck operatively engaging the drill, a xed casing surrounding said chuck and having a discharge opening for cuttings, said chuck having a passage therethrough the lower end of which communicates with the bore of the drill and the upper end of which opens into the cuttings delivered into the said casing by said passage. y

HARRY I. LEWIS. FREDERICK W. SEYBOLD. 

